Each bar shows the contribution of a single driver to GHG emission trends during a determined period. The thick short black lines indicate the combined effect of all emission drivers, i.e. the overall GHG emission trend during the period considered. Different data sources have been used for the calculation of carbon intensity, which may result in a high uncertainty of the results for this driver.
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New supermarkets in the area can reduce business for smaller shops. Pollution and congestion would be significantly less if consumers frequented their local shops, rather than travelling long distances to out-of-town shopping centres.
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